Fig. 3 from Ultraviolet and Multiwavelength Variability of the Blazar 3C 279: Evidence for Thermal Emission

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Ultraviolet and Multiwavelength Variability of the Blazar 3C 279: Evidence for Thermal Emission

Authors: E. Pian, C. M. Urry, L. Maraschi, G. Madejski, I. M. McHardy, A. Koratkar, A. Treves, L. Chiappetti, P. Grandi, R. C. Hartman, H. Kubo, C. M. Leach, J. E. Pesce, C. Imhoff, R. Thompson, and A. E. Wehrle

Pian et al. 1999 The Astrophysical Journal 521 112.

Provider: AAS Journals

Caption: Fig. 3.

Dereddened UV flux at 2000 Å vs. energy index at the various epochs of IUE and HST observations of 3C 279. The upper branch shows the usual anticorrelation of spectral index and intensity for bright synchrotron sources, while the lower branch suggests the increasing importance of a flat accretion disk component at the lowest UV fluxes.

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